Southeastern is accepting Southern tickets from Beckenham Junction and Elmers End to London Bridge and vice versa.

First Capital Connect and London Overground are accepting each others tickets on all reasonable routes.

Gatwick Express services are currently suspended. London Overground is reporting severe delays from Highbury & Islington to West Croydon, Crystal Palace and Clapham Junction due to the trespass incident on the track at Honor Oak Park.

A British Transport Police (BTP) spokeswoman said: “BTP officers were called to Honor Oak Park station on Thursday, January 24 following a report of a man walking on the line.

“Officers attended the incident, which was reported to BTP at 7.22am.

“An extensive search of the track and surrounding area was carried out by officers by to no avail.”

Anyone with information is asked to call the BTP on 0800 405040 quoting incident number 77 of 24/01/2013.